![File:Hertz spark gap transmitter and parabolic antenna.png](https://upload.wikimedia.org/wikipedia/commons/thumb/b/b3/Hertz_spark_gap_transmitter_and_parabolic_antenna.png/528px-Hertz_spark_gap_transmitter_and_parabolic_antenna.png)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 20:03, 19 June 2018 | ![]() | 816 × 926 (130 KB) | Chetvorno | Added closeup of the dipole antenna which was part of the original drawing |
18:44, 8 December 2011 | ![]() | 506 × 926 (92 KB) | Chetvorno |
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